https://www.google.com/search?q=free+speech+arrest
I'd also argue that having speech consigned to these places[1] when the whole country is supposedly a free speech zone doesn't follow the spirit of the 1st Amendment. Also if they setup a free speech zone and you don't use it then you can be arrested for that
Obviously you can't be charged for "exercising free speech rights" since that isn't a crime, the charge is always something else like "disturbing the peace" or "resisting arrest" or some other trumped up nonsense.